86ee5b4b1b
Fixes: #26333.
Previously, this endpoint only updates the `StatusCheckContexts` field
when `EnableStatusCheck==true`, which makes it impossible to clear the
array otherwise.
This patch uses slice `nil`-ness to decide whether to update the list of
checks. The field is ignored when either the client explicitly passes in
a null, or just omits the field from the json ([which causes
`json.Unmarshal` to leave the struct field
unchanged](https://go.dev/play/p/Z2XHOILuB1Q)). I think this is a better
measure of intent than whether the `EnableStatusCheck` flag was set,
because it matches the semantics of other field types.
Also adds a test case. I noticed that [`testAPIEditBranchProtection`
only checks the branch
name](
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| e2e | ||
| fuzz | ||
| gitea-lfs-meta | ||
| gitea-repositories-meta | ||
| integration | ||
| mssql.ini.tmpl | ||
| mysql.ini.tmpl | ||
| mysql8.ini.tmpl | ||
| pgsql.ini.tmpl | ||
| sqlite.ini.tmpl | ||
| test_utils.go | ||